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platform_system_core/include/system/graphics.h
Colin Cross 7c7990e6fd Fix warnings in system/ headers 
system/core/include is included in the global include path using
-isystem, which hides all warnings.  Fix warnings in
system/core/include/system in preparation for moving from -isystem to -I.

- Fix invalid doxygen syntax in graphics.h
- Use a pragma to hide a C99 extension warning on the flexible length
  array in graphics.h
- Make static functions in radio.h static inline
- Fix size_t printf and size_t vs. ssize_t comparision in qemu_pipe.h
- Fix old style cast in window.h

Test: m -j native
Bug: 31492149
Change-Id: I857f289e4c8e303494831873282bbb69de155c10
2016-09-21 17:46:59 -07:00

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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SYSTEM_CORE_INCLUDE_ANDROID_GRAPHICS_H
#define SYSTEM_CORE_INCLUDE_ANDROID_GRAPHICS_H
#include <stddef.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* If the HAL needs to create service threads to handle graphics related
* tasks, these threads need to run at HAL_PRIORITY_URGENT_DISPLAY priority
* if they can block the main rendering thread in any way.
*
* the priority of the current thread can be set with:
*
* #include <sys/resource.h>
* setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY);
*
*/
#define HAL_PRIORITY_URGENT_DISPLAY (-8)
/**
* pixel format definitions
*/
typedef enum android_pixel_format {
/*
* "linear" color pixel formats:
*
* When used with ANativeWindow, the dataSpace field describes the color
* space of the buffer.
*
* The color space determines, for example, if the formats are linear or
* gamma-corrected; or whether any special operations are performed when
* reading or writing into a buffer in one of these formats.
*/
HAL_PIXEL_FORMAT_RGBA_8888 = 1,
HAL_PIXEL_FORMAT_RGBX_8888 = 2,
HAL_PIXEL_FORMAT_RGB_888 = 3,
HAL_PIXEL_FORMAT_RGB_565 = 4,
HAL_PIXEL_FORMAT_BGRA_8888 = 5,
/*
* 0x100 - 0x1FF
*
* This range is reserved for pixel formats that are specific to the HAL
* implementation. Implementations can use any value in this range to
* communicate video pixel formats between their HAL modules. These formats
* must not have an alpha channel. Additionally, an EGLimage created from a
* gralloc buffer of one of these formats must be supported for use with the
* GL_OES_EGL_image_external OpenGL ES extension.
*/
/*
* Android YUV format:
*
* This format is exposed outside of the HAL to software decoders and
* applications. EGLImageKHR must support it in conjunction with the
* OES_EGL_image_external extension.
*
* YV12 is a 4:2:0 YCrCb planar format comprised of a WxH Y plane followed
* by (W/2) x (H/2) Cr and Cb planes.
*
* This format assumes
* - an even width
* - an even height
* - a horizontal stride multiple of 16 pixels
* - a vertical stride equal to the height
*
* y_size = stride * height
* c_stride = ALIGN(stride/2, 16)
* c_size = c_stride * height/2
* size = y_size + c_size * 2
* cr_offset = y_size
* cb_offset = y_size + c_size
*
* When used with ANativeWindow, the dataSpace field describes the color
* space of the buffer.
*/
HAL_PIXEL_FORMAT_YV12 = 0x32315659, // YCrCb 4:2:0 Planar
/*
* Android Y8 format:
*
* This format is exposed outside of the HAL to the framework.
* The expected gralloc usage flags are SW_* and HW_CAMERA_*,
* and no other HW_ flags will be used.
*
* Y8 is a YUV planar format comprised of a WxH Y plane,
* with each pixel being represented by 8 bits.
*
* It is equivalent to just the Y plane from YV12.
*
* This format assumes
* - an even width
* - an even height
* - a horizontal stride multiple of 16 pixels
* - a vertical stride equal to the height
*
* size = stride * height
*
* When used with ANativeWindow, the dataSpace field describes the color
* space of the buffer.
*/
HAL_PIXEL_FORMAT_Y8 = 0x20203859,
/*
* Android Y16 format:
*
* This format is exposed outside of the HAL to the framework.
* The expected gralloc usage flags are SW_* and HW_CAMERA_*,
* and no other HW_ flags will be used.
*
* Y16 is a YUV planar format comprised of a WxH Y plane,
* with each pixel being represented by 16 bits.
*
* It is just like Y8, but has double the bits per pixel (little endian).
*
* This format assumes
* - an even width
* - an even height
* - a horizontal stride multiple of 16 pixels
* - a vertical stride equal to the height
* - strides are specified in pixels, not in bytes
*
* size = stride * height * 2
*
* When used with ANativeWindow, the dataSpace field describes the color
* space of the buffer, except that dataSpace field
* HAL_DATASPACE_DEPTH indicates that this buffer contains a depth
* image where each sample is a distance value measured by a depth camera,
* plus an associated confidence value.
*/
HAL_PIXEL_FORMAT_Y16 = 0x20363159,
/*
* Android RAW sensor format:
*
* This format is exposed outside of the camera HAL to applications.
*
* RAW16 is a single-channel, 16-bit, little endian format, typically
* representing raw Bayer-pattern images from an image sensor, with minimal
* processing.
*
* The exact pixel layout of the data in the buffer is sensor-dependent, and
* needs to be queried from the camera device.
*
* Generally, not all 16 bits are used; more common values are 10 or 12
* bits. If not all bits are used, the lower-order bits are filled first.
* All parameters to interpret the raw data (black and white points,
* color space, etc) must be queried from the camera device.
*
* This format assumes
* - an even width
* - an even height
* - a horizontal stride multiple of 16 pixels
* - a vertical stride equal to the height
* - strides are specified in pixels, not in bytes
*
* size = stride * height * 2
*
* This format must be accepted by the gralloc module when used with the
* following usage flags:
* - GRALLOC_USAGE_HW_CAMERA_*
* - GRALLOC_USAGE_SW_*
* - GRALLOC_USAGE_RENDERSCRIPT
*
* When used with ANativeWindow, the dataSpace should be
* HAL_DATASPACE_ARBITRARY, as raw image sensor buffers require substantial
* extra metadata to define.
*/
HAL_PIXEL_FORMAT_RAW16 = 0x20,
/*
* Android RAW10 format:
*
* This format is exposed outside of the camera HAL to applications.
*
* RAW10 is a single-channel, 10-bit per pixel, densely packed in each row,
* unprocessed format, usually representing raw Bayer-pattern images coming from
* an image sensor.
*
* In an image buffer with this format, starting from the first pixel of each
* row, each 4 consecutive pixels are packed into 5 bytes (40 bits). Each one
* of the first 4 bytes contains the top 8 bits of each pixel, The fifth byte
* contains the 2 least significant bits of the 4 pixels, the exact layout data
* for each 4 consecutive pixels is illustrated below (Pi[j] stands for the jth
* bit of the ith pixel):
*
* bit 7 bit 0
* =====|=====|=====|=====|=====|=====|=====|=====|
* Byte 0: |P0[9]|P0[8]|P0[7]|P0[6]|P0[5]|P0[4]|P0[3]|P0[2]|
* |-----|-----|-----|-----|-----|-----|-----|-----|
* Byte 1: |P1[9]|P1[8]|P1[7]|P1[6]|P1[5]|P1[4]|P1[3]|P1[2]|
* |-----|-----|-----|-----|-----|-----|-----|-----|
* Byte 2: |P2[9]|P2[8]|P2[7]|P2[6]|P2[5]|P2[4]|P2[3]|P2[2]|
* |-----|-----|-----|-----|-----|-----|-----|-----|
* Byte 3: |P3[9]|P3[8]|P3[7]|P3[6]|P3[5]|P3[4]|P3[3]|P3[2]|
* |-----|-----|-----|-----|-----|-----|-----|-----|
* Byte 4: |P3[1]|P3[0]|P2[1]|P2[0]|P1[1]|P1[0]|P0[1]|P0[0]|
* ===============================================
*
* This format assumes
* - a width multiple of 4 pixels
* - an even height
* - a vertical stride equal to the height
* - strides are specified in bytes, not in pixels
*
* size = stride * height
*
* When stride is equal to width * (10 / 8), there will be no padding bytes at
* the end of each row, the entire image data is densely packed. When stride is
* larger than width * (10 / 8), padding bytes will be present at the end of each
* row (including the last row).
*
* This format must be accepted by the gralloc module when used with the
* following usage flags:
* - GRALLOC_USAGE_HW_CAMERA_*
* - GRALLOC_USAGE_SW_*
* - GRALLOC_USAGE_RENDERSCRIPT
*
* When used with ANativeWindow, the dataSpace field should be
* HAL_DATASPACE_ARBITRARY, as raw image sensor buffers require substantial
* extra metadata to define.
*/
HAL_PIXEL_FORMAT_RAW10 = 0x25,
/*
* Android RAW12 format:
*
* This format is exposed outside of camera HAL to applications.
*
* RAW12 is a single-channel, 12-bit per pixel, densely packed in each row,
* unprocessed format, usually representing raw Bayer-pattern images coming from
* an image sensor.
*
* In an image buffer with this format, starting from the first pixel of each
* row, each two consecutive pixels are packed into 3 bytes (24 bits). The first
* and second byte contains the top 8 bits of first and second pixel. The third
* byte contains the 4 least significant bits of the two pixels, the exact layout
* data for each two consecutive pixels is illustrated below (Pi[j] stands for
* the jth bit of the ith pixel):
*
* bit 7 bit 0
* ======|======|======|======|======|======|======|======|
* Byte 0: |P0[11]|P0[10]|P0[ 9]|P0[ 8]|P0[ 7]|P0[ 6]|P0[ 5]|P0[ 4]|
* |------|------|------|------|------|------|------|------|
* Byte 1: |P1[11]|P1[10]|P1[ 9]|P1[ 8]|P1[ 7]|P1[ 6]|P1[ 5]|P1[ 4]|
* |------|------|------|------|------|------|------|------|
* Byte 2: |P1[ 3]|P1[ 2]|P1[ 1]|P1[ 0]|P0[ 3]|P0[ 2]|P0[ 1]|P0[ 0]|
* =======================================================
*
* This format assumes:
* - a width multiple of 4 pixels
* - an even height
* - a vertical stride equal to the height
* - strides are specified in bytes, not in pixels
*
* size = stride * height
*
* When stride is equal to width * (12 / 8), there will be no padding bytes at
* the end of each row, the entire image data is densely packed. When stride is
* larger than width * (12 / 8), padding bytes will be present at the end of
* each row (including the last row).
*
* This format must be accepted by the gralloc module when used with the
* following usage flags:
* - GRALLOC_USAGE_HW_CAMERA_*
* - GRALLOC_USAGE_SW_*
* - GRALLOC_USAGE_RENDERSCRIPT
*
* When used with ANativeWindow, the dataSpace field should be
* HAL_DATASPACE_ARBITRARY, as raw image sensor buffers require substantial
* extra metadata to define.
*/
HAL_PIXEL_FORMAT_RAW12 = 0x26,
/*
* Android opaque RAW format:
*
* This format is exposed outside of the camera HAL to applications.
*
* RAW_OPAQUE is a format for unprocessed raw image buffers coming from an
* image sensor. The actual structure of buffers of this format is
* implementation-dependent.
*
* This format must be accepted by the gralloc module when used with the
* following usage flags:
* - GRALLOC_USAGE_HW_CAMERA_*
* - GRALLOC_USAGE_SW_*
* - GRALLOC_USAGE_RENDERSCRIPT
*
* When used with ANativeWindow, the dataSpace field should be
* HAL_DATASPACE_ARBITRARY, as raw image sensor buffers require substantial
* extra metadata to define.
*/
HAL_PIXEL_FORMAT_RAW_OPAQUE = 0x24,
/*
* Android binary blob graphics buffer format:
*
* This format is used to carry task-specific data which does not have a
* standard image structure. The details of the format are left to the two
* endpoints.
*
* A typical use case is for transporting JPEG-compressed images from the
* Camera HAL to the framework or to applications.
*
* Buffers of this format must have a height of 1, and width equal to their
* size in bytes.
*
* When used with ANativeWindow, the mapping of the dataSpace field to
* buffer contents for BLOB is as follows:
*
* dataSpace value | Buffer contents
* -------------------------------+-----------------------------------------
* HAL_DATASPACE_JFIF | An encoded JPEG image
* HAL_DATASPACE_DEPTH | An android_depth_points buffer
* Other | Unsupported
*
*/
HAL_PIXEL_FORMAT_BLOB = 0x21,
/*
* Android format indicating that the choice of format is entirely up to the
* device-specific Gralloc implementation.
*
* The Gralloc implementation should examine the usage bits passed in when
* allocating a buffer with this format, and it should derive the pixel
* format from those usage flags. This format will never be used with any
* of the GRALLOC_USAGE_SW_* usage flags.
*
* If a buffer of this format is to be used as an OpenGL ES texture, the
* framework will assume that sampling the texture will always return an
* alpha value of 1.0 (i.e. the buffer contains only opaque pixel values).
*
* When used with ANativeWindow, the dataSpace field describes the color
* space of the buffer.
*/
HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED = 0x22,
/*
* Android flexible YCbCr 4:2:0 formats
*
* This format allows platforms to use an efficient YCbCr/YCrCb 4:2:0
* buffer layout, while still describing the general format in a
* layout-independent manner. While called YCbCr, it can be
* used to describe formats with either chromatic ordering, as well as
* whole planar or semiplanar layouts.
*
* struct android_ycbcr (below) is the the struct used to describe it.
*
* This format must be accepted by the gralloc module when
* USAGE_SW_WRITE_* or USAGE_SW_READ_* are set.
*
* This format is locked for use by gralloc's (*lock_ycbcr) method, and
* locking with the (*lock) method will return an error.
*
* When used with ANativeWindow, the dataSpace field describes the color
* space of the buffer.
*/
HAL_PIXEL_FORMAT_YCbCr_420_888 = 0x23,
/*
* Android flexible YCbCr 4:2:2 formats
*
* This format allows platforms to use an efficient YCbCr/YCrCb 4:2:2
* buffer layout, while still describing the general format in a
* layout-independent manner. While called YCbCr, it can be
* used to describe formats with either chromatic ordering, as well as
* whole planar or semiplanar layouts.
*
* This format is currently only used by SW readable buffers
* produced by MediaCodecs, so the gralloc module can ignore this format.
*/
HAL_PIXEL_FORMAT_YCbCr_422_888 = 0x27,
/*
* Android flexible YCbCr 4:4:4 formats
*
* This format allows platforms to use an efficient YCbCr/YCrCb 4:4:4
* buffer layout, while still describing the general format in a
* layout-independent manner. While called YCbCr, it can be
* used to describe formats with either chromatic ordering, as well as
* whole planar or semiplanar layouts.
*
* This format is currently only used by SW readable buffers
* produced by MediaCodecs, so the gralloc module can ignore this format.
*/
HAL_PIXEL_FORMAT_YCbCr_444_888 = 0x28,
/*
* Android flexible RGB 888 formats
*
* This format allows platforms to use an efficient RGB/BGR/RGBX/BGRX
* buffer layout, while still describing the general format in a
* layout-independent manner. While called RGB, it can be
* used to describe formats with either color ordering and optional
* padding, as well as whole planar layout.
*
* This format is currently only used by SW readable buffers
* produced by MediaCodecs, so the gralloc module can ignore this format.
*/
HAL_PIXEL_FORMAT_FLEX_RGB_888 = 0x29,
/*
* Android flexible RGBA 8888 formats
*
* This format allows platforms to use an efficient RGBA/BGRA/ARGB/ABGR
* buffer layout, while still describing the general format in a
* layout-independent manner. While called RGBA, it can be
* used to describe formats with any of the component orderings, as
* well as whole planar layout.
*
* This format is currently only used by SW readable buffers
* produced by MediaCodecs, so the gralloc module can ignore this format.
*/
HAL_PIXEL_FORMAT_FLEX_RGBA_8888 = 0x2A,
/* Legacy formats (deprecated), used by ImageFormat.java */
HAL_PIXEL_FORMAT_YCbCr_422_SP = 0x10, // NV16
HAL_PIXEL_FORMAT_YCrCb_420_SP = 0x11, // NV21
HAL_PIXEL_FORMAT_YCbCr_422_I = 0x14, // YUY2
} android_pixel_format_t;
/*
* Structure for describing YCbCr formats for consumption by applications.
* This is used with HAL_PIXEL_FORMAT_YCbCr_*_888.
*
* Buffer chroma subsampling is defined in the format.
* e.g. HAL_PIXEL_FORMAT_YCbCr_420_888 has subsampling 4:2:0.
*
* Buffers must have a 8 bit depth.
*
* y, cb, and cr point to the first byte of their respective planes.
*
* Stride describes the distance in bytes from the first value of one row of
* the image to the first value of the next row. It includes the width of the
* image plus padding.
* ystride is the stride of the luma plane.
* cstride is the stride of the chroma planes.
*
* chroma_step is the distance in bytes from one chroma pixel value to the
* next. This is 2 bytes for semiplanar (because chroma values are interleaved
* and each chroma value is one byte) and 1 for planar.
*/
struct android_ycbcr {
void *y;
void *cb;
void *cr;
size_t ystride;
size_t cstride;
size_t chroma_step;
/** reserved for future use, set to 0 by gralloc's (*lock_ycbcr)() */
uint32_t reserved[8];
};
/*
* Structures for describing flexible YUVA/RGBA formats for consumption by
* applications. Such flexible formats contain a plane for each component (e.g.
* red, green, blue), where each plane is laid out in a grid-like pattern
* occupying unique byte addresses and with consistent byte offsets between
* neighboring pixels.
*
* The android_flex_layout structure is used with any pixel format that can be
* represented by it, such as:
* - HAL_PIXEL_FORMAT_YCbCr_*_888
* - HAL_PIXEL_FORMAT_FLEX_RGB*_888
* - HAL_PIXEL_FORMAT_RGB[AX]_888[8],BGRA_8888,RGB_888
* - HAL_PIXEL_FORMAT_YV12,Y8,Y16,YCbCr_422_SP/I,YCrCb_420_SP
* - even implementation defined formats that can be represented by
* the structures
*
* Vertical increment (aka. row increment or stride) describes the distance in
* bytes from the first pixel of one row to the first pixel of the next row
* (below) for the component plane. This can be negative.
*
* Horizontal increment (aka. column or pixel increment) describes the distance
* in bytes from one pixel to the next pixel (to the right) on the same row for
* the component plane. This can be negative.
*
* Each plane can be subsampled either vertically or horizontally by
* a power-of-two factor.
*
* The bit-depth of each component can be arbitrary, as long as the pixels are
* laid out on whole bytes, in native byte-order, using the most significant
* bits of each unit.
*/
typedef enum android_flex_component {
/* luma */
FLEX_COMPONENT_Y = 1 << 0,
/* chroma blue */
FLEX_COMPONENT_Cb = 1 << 1,
/* chroma red */
FLEX_COMPONENT_Cr = 1 << 2,
/* red */
FLEX_COMPONENT_R = 1 << 10,
/* green */
FLEX_COMPONENT_G = 1 << 11,
/* blue */
FLEX_COMPONENT_B = 1 << 12,
/* alpha */
FLEX_COMPONENT_A = 1 << 30,
} android_flex_component_t;
typedef struct android_flex_plane {
/* pointer to the first byte of the top-left pixel of the plane. */
uint8_t *top_left;
android_flex_component_t component;
/* bits allocated for the component in each pixel. Must be a positive
multiple of 8. */
int32_t bits_per_component;
/* number of the most significant bits used in the format for this
component. Must be between 1 and bits_per_component, inclusive. */
int32_t bits_used;
/* horizontal increment */
int32_t h_increment;
/* vertical increment */
int32_t v_increment;
/* horizontal subsampling. Must be a positive power of 2. */
int32_t h_subsampling;
/* vertical subsampling. Must be a positive power of 2. */
int32_t v_subsampling;
} android_flex_plane_t;
typedef enum android_flex_format {
/* not a flexible format */
FLEX_FORMAT_INVALID = 0x0,
FLEX_FORMAT_Y = FLEX_COMPONENT_Y,
FLEX_FORMAT_YCbCr = FLEX_COMPONENT_Y | FLEX_COMPONENT_Cb | FLEX_COMPONENT_Cr,
FLEX_FORMAT_YCbCrA = FLEX_FORMAT_YCbCr | FLEX_COMPONENT_A,
FLEX_FORMAT_RGB = FLEX_COMPONENT_R | FLEX_COMPONENT_G | FLEX_COMPONENT_B,
FLEX_FORMAT_RGBA = FLEX_FORMAT_RGB | FLEX_COMPONENT_A,
} android_flex_format_t;
typedef struct android_flex_layout {
/* the kind of flexible format */
android_flex_format_t format;
/* number of planes; 0 for FLEX_FORMAT_INVALID */
uint32_t num_planes;
/* a plane for each component; ordered in increasing component value order.
E.g. FLEX_FORMAT_RGBA maps 0 -> R, 1 -> G, etc.
Can be NULL for FLEX_FORMAT_INVALID */
android_flex_plane_t *planes;
} android_flex_layout_t;
/**
* Structure used to define depth point clouds for format HAL_PIXEL_FORMAT_BLOB
* with dataSpace value of HAL_DATASPACE_DEPTH.
* When locking a native buffer of the above format and dataSpace value,
* the vaddr pointer can be cast to this structure.
*
* A variable-length list of (x,y,z, confidence) 3D points, as floats. (x, y,
* z) represents a measured point's position, with the coordinate system defined
* by the data source. Confidence represents the estimated likelihood that this
* measurement is correct. It is between 0.f and 1.f, inclusive, with 1.f ==
* 100% confidence.
*
* num_points is the number of points in the list
*
* xyz_points is the flexible array of floating-point values.
* It contains (num_points) * 4 floats.
*
* For example:
* android_depth_points d = get_depth_buffer();
* struct {
* float x; float y; float z; float confidence;
* } firstPoint, lastPoint;
*
* firstPoint.x = d.xyzc_points[0];
* firstPoint.y = d.xyzc_points[1];
* firstPoint.z = d.xyzc_points[2];
* firstPoint.confidence = d.xyzc_points[3];
* lastPoint.x = d.xyzc_points[(d.num_points - 1) * 4 + 0];
* lastPoint.y = d.xyzc_points[(d.num_points - 1) * 4 + 1];
* lastPoint.z = d.xyzc_points[(d.num_points - 1) * 4 + 2];
* lastPoint.confidence = d.xyzc_points[(d.num_points - 1) * 4 + 3];
*/
struct android_depth_points {
uint32_t num_points;
/** reserved for future use, set to 0 by gralloc's (*lock)() */
uint32_t reserved[8];
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wc99-extensions"
#endif
float xyzc_points[];
#if defined(__clang__)
#pragma clang diagnostic pop
#endif
};
/**
* Transformation definitions
*
* IMPORTANT NOTE:
* HAL_TRANSFORM_ROT_90 is applied CLOCKWISE and AFTER HAL_TRANSFORM_FLIP_{H|V}.
*
*/
typedef enum android_transform {
/* flip source image horizontally (around the vertical axis) */
HAL_TRANSFORM_FLIP_H = 0x01,
/* flip source image vertically (around the horizontal axis)*/
HAL_TRANSFORM_FLIP_V = 0x02,
/* rotate source image 90 degrees clockwise */
HAL_TRANSFORM_ROT_90 = 0x04,
/* rotate source image 180 degrees */
HAL_TRANSFORM_ROT_180 = 0x03,
/* rotate source image 270 degrees clockwise */
HAL_TRANSFORM_ROT_270 = 0x07,
/* don't use. see system/window.h */
HAL_TRANSFORM_RESERVED = 0x08,
} android_transform_t;
/**
* Dataspace Definitions
* ======================
*
* Dataspace is the definition of how pixel values should be interpreted.
*
* For many formats, this is the colorspace of the image data, which includes
* primaries (including white point) and the transfer characteristic function,
* which describes both gamma curve and numeric range (within the bit depth).
*
* Other dataspaces include depth measurement data from a depth camera.
*
* A dataspace is comprised of a number of fields.
*
* Version
* --------
* The top 2 bits represent the revision of the field specification. This is
* currently always 0.
*
*
* bits 31-30 29 - 0
* +-----+----------------------------------------------------+
* fields | Rev | Revision specific fields |
* +-----+----------------------------------------------------+
*
* Field layout for version = 0:
* ----------------------------
*
* A dataspace is comprised of the following fields:
* Standard
* Transfer function
* Range
*
* bits 31-30 29-27 26 - 22 21 - 16 15 - 0
* +-----+-----+--------+--------+----------------------------+
* fields | 0 |Range|Transfer|Standard| Legacy and custom |
* +-----+-----+--------+--------+----------------------------+
* VV RRR TTTTT SSSSSS LLLLLLLL LLLLLLLL
*
* If range, transfer and standard fields are all 0 (e.g. top 16 bits are
* all zeroes), the bottom 16 bits contain either a legacy dataspace value,
* or a custom value.
*/
typedef enum android_dataspace {
/*
* Default-assumption data space, when not explicitly specified.
*
* It is safest to assume the buffer is an image with sRGB primaries and
* encoding ranges, but the consumer and/or the producer of the data may
* simply be using defaults. No automatic gamma transform should be
* expected, except for a possible display gamma transform when drawn to a
* screen.
*/
HAL_DATASPACE_UNKNOWN = 0x0,
/*
* Arbitrary dataspace with manually defined characteristics. Definition
* for colorspaces or other meaning must be communicated separately.
*
* This is used when specifying primaries, transfer characteristics,
* etc. separately.
*
* A typical use case is in video encoding parameters (e.g. for H.264),
* where a colorspace can have separately defined primaries, transfer
* characteristics, etc.
*/
HAL_DATASPACE_ARBITRARY = 0x1,
/*
* Color-description aspects
*
* The following aspects define various characteristics of the color
* specification. These represent bitfields, so that a data space value
* can specify each of them independently.
*/
HAL_DATASPACE_STANDARD_SHIFT = 16,
/*
* Standard aspect
*
* Defines the chromaticity coordinates of the source primaries in terms of
* the CIE 1931 definition of x and y specified in ISO 11664-1.
*/
HAL_DATASPACE_STANDARD_MASK = 63 << HAL_DATASPACE_STANDARD_SHIFT, // 0x3F
/*
* Chromacity coordinates are unknown or are determined by the application.
* Implementations shall use the following suggested standards:
*
* All YCbCr formats: BT709 if size is 720p or larger (since most video
* content is letterboxed this corresponds to width is
* 1280 or greater, or height is 720 or greater).
* BT601_625 if size is smaller than 720p or is JPEG.
* All RGB formats: BT709.
*
* For all other formats standard is undefined, and implementations should use
* an appropriate standard for the data represented.
*/
HAL_DATASPACE_STANDARD_UNSPECIFIED = 0 << HAL_DATASPACE_STANDARD_SHIFT,
/*
* Primaries: x y
* green 0.300 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* Use the unadjusted KR = 0.2126, KB = 0.0722 luminance interpretation
* for RGB conversion.
*/
HAL_DATASPACE_STANDARD_BT709 = 1 << HAL_DATASPACE_STANDARD_SHIFT,
/*
* Primaries: x y
* green 0.290 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* KR = 0.299, KB = 0.114. This adjusts the luminance interpretation
* for RGB conversion from the one purely determined by the primaries
* to minimize the color shift into RGB space that uses BT.709
* primaries.
*/
HAL_DATASPACE_STANDARD_BT601_625 = 2 << HAL_DATASPACE_STANDARD_SHIFT,
/*
* Primaries: x y
* green 0.290 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* Use the unadjusted KR = 0.222, KB = 0.071 luminance interpretation
* for RGB conversion.
*/
HAL_DATASPACE_STANDARD_BT601_625_UNADJUSTED = 3 << HAL_DATASPACE_STANDARD_SHIFT,
/*
* Primaries: x y
* green 0.310 0.595
* blue 0.155 0.070
* red 0.630 0.340
* white (D65) 0.3127 0.3290
*
* KR = 0.299, KB = 0.114. This adjusts the luminance interpretation
* for RGB conversion from the one purely determined by the primaries
* to minimize the color shift into RGB space that uses BT.709
* primaries.
*/
HAL_DATASPACE_STANDARD_BT601_525 = 4 << HAL_DATASPACE_STANDARD_SHIFT,
/*
* Primaries: x y
* green 0.310 0.595
* blue 0.155 0.070
* red 0.630 0.340
* white (D65) 0.3127 0.3290
*
* Use the unadjusted KR = 0.212, KB = 0.087 luminance interpretation
* for RGB conversion (as in SMPTE 240M).
*/
HAL_DATASPACE_STANDARD_BT601_525_UNADJUSTED = 5 << HAL_DATASPACE_STANDARD_SHIFT,
/*
* Primaries: x y
* green 0.170 0.797
* blue 0.131 0.046
* red 0.708 0.292
* white (D65) 0.3127 0.3290
*
* Use the unadjusted KR = 0.2627, KB = 0.0593 luminance interpretation
* for RGB conversion.
*/
HAL_DATASPACE_STANDARD_BT2020 = 6 << HAL_DATASPACE_STANDARD_SHIFT,
/*
* Primaries: x y
* green 0.170 0.797
* blue 0.131 0.046
* red 0.708 0.292
* white (D65) 0.3127 0.3290
*
* Use the unadjusted KR = 0.2627, KB = 0.0593 luminance interpretation
* for RGB conversion using the linear domain.
*/
HAL_DATASPACE_STANDARD_BT2020_CONSTANT_LUMINANCE = 7 << HAL_DATASPACE_STANDARD_SHIFT,
/*
* Primaries: x y
* green 0.21 0.71
* blue 0.14 0.08
* red 0.67 0.33
* white (C) 0.310 0.316
*
* Use the unadjusted KR = 0.30, KB = 0.11 luminance interpretation
* for RGB conversion.
*/
HAL_DATASPACE_STANDARD_BT470M = 8 << HAL_DATASPACE_STANDARD_SHIFT,
/*
* Primaries: x y
* green 0.243 0.692
* blue 0.145 0.049
* red 0.681 0.319
* white (C) 0.310 0.316
*
* Use the unadjusted KR = 0.254, KB = 0.068 luminance interpretation
* for RGB conversion.
*/
HAL_DATASPACE_STANDARD_FILM = 9 << HAL_DATASPACE_STANDARD_SHIFT,
HAL_DATASPACE_TRANSFER_SHIFT = 22,
/*
* Transfer aspect
*
* Transfer characteristics are the opto-electronic transfer characteristic
* at the source as a function of linear optical intensity (luminance).
*
* For digital signals, E corresponds to the recorded value. Normally, the
* transfer function is applied in RGB space to each of the R, G and B
* components independently. This may result in color shift that can be
* minized by applying the transfer function in Lab space only for the L
* component. Implementation may apply the transfer function in RGB space
* for all pixel formats if desired.
*/
HAL_DATASPACE_TRANSFER_MASK = 31 << HAL_DATASPACE_TRANSFER_SHIFT, // 0x1F
/*
* Transfer characteristics are unknown or are determined by the
* application.
*
* Implementations should use the following transfer functions:
*
* For YCbCr formats: use HAL_DATASPACE_TRANSFER_SMPTE_170M
* For RGB formats: use HAL_DATASPACE_TRANSFER_SRGB
*
* For all other formats transfer function is undefined, and implementations
* should use an appropriate standard for the data represented.
*/
HAL_DATASPACE_TRANSFER_UNSPECIFIED = 0 << HAL_DATASPACE_TRANSFER_SHIFT,
/*
* Transfer characteristic curve:
* E = L
* L - luminance of image 0 <= L <= 1 for conventional colorimetry
* E - corresponding electrical signal
*/
HAL_DATASPACE_TRANSFER_LINEAR = 1 << HAL_DATASPACE_TRANSFER_SHIFT,
/*
* Transfer characteristic curve:
*
* E = 1.055 * L^(1/2.4) - 0.055 for 0.0031308 <= L <= 1
* = 12.92 * L for 0 <= L < 0.0031308
* L - luminance of image 0 <= L <= 1 for conventional colorimetry
* E - corresponding electrical signal
*/
HAL_DATASPACE_TRANSFER_SRGB = 2 << HAL_DATASPACE_TRANSFER_SHIFT,
/*
* BT.601 525, BT.601 625, BT.709, BT.2020
*
* Transfer characteristic curve:
* E = 1.099 * L ^ 0.45 - 0.099 for 0.018 <= L <= 1
* = 4.500 * L for 0 <= L < 0.018
* L - luminance of image 0 <= L <= 1 for conventional colorimetry
* E - corresponding electrical signal
*/
HAL_DATASPACE_TRANSFER_SMPTE_170M = 3 << HAL_DATASPACE_TRANSFER_SHIFT,
/*
* Assumed display gamma 2.2.
*
* Transfer characteristic curve:
* E = L ^ (1/2.2)
* L - luminance of image 0 <= L <= 1 for conventional colorimetry
* E - corresponding electrical signal
*/
HAL_DATASPACE_TRANSFER_GAMMA2_2 = 4 << HAL_DATASPACE_TRANSFER_SHIFT,
/*
* display gamma 2.8.
*
* Transfer characteristic curve:
* E = L ^ (1/2.8)
* L - luminance of image 0 <= L <= 1 for conventional colorimetry
* E - corresponding electrical signal
*/
HAL_DATASPACE_TRANSFER_GAMMA2_8 = 5 << HAL_DATASPACE_TRANSFER_SHIFT,
/*
* SMPTE ST 2084
*
* Transfer characteristic curve:
* E = ((c1 + c2 * L^n) / (1 + c3 * L^n)) ^ m
* c1 = c3 - c2 + 1 = 3424 / 4096 = 0.8359375
* c2 = 32 * 2413 / 4096 = 18.8515625
* c3 = 32 * 2392 / 4096 = 18.6875
* m = 128 * 2523 / 4096 = 78.84375
* n = 0.25 * 2610 / 4096 = 0.1593017578125
* L - luminance of image 0 <= L <= 1 for HDR colorimetry.
* L = 1 corresponds to 10000 cd/m2
* E - corresponding electrical signal
*/
HAL_DATASPACE_TRANSFER_ST2084 = 6 << HAL_DATASPACE_TRANSFER_SHIFT,
/*
* ARIB STD-B67 Hybrid Log Gamma
*
* Transfer characteristic curve:
* E = r * L^0.5 for 0 <= L <= 1
* = a * ln(L - b) + c for 1 < L
* a = 0.17883277
* b = 0.28466892
* c = 0.55991073
* r = 0.5
* L - luminance of image 0 <= L for HDR colorimetry. L = 1 corresponds
* to reference white level of 100 cd/m2
* E - corresponding electrical signal
*/
HAL_DATASPACE_TRANSFER_HLG = 7 << HAL_DATASPACE_TRANSFER_SHIFT,
HAL_DATASPACE_RANGE_SHIFT = 27,
/*
* Range aspect
*
* Defines the range of values corresponding to the unit range of 0-1.
* This is defined for YCbCr only, but can be expanded to RGB space.
*/
HAL_DATASPACE_RANGE_MASK = 7 << HAL_DATASPACE_RANGE_SHIFT, // 0x7
/*
* Range is unknown or are determined by the application. Implementations
* shall use the following suggested ranges:
*
* All YCbCr formats: limited range.
* All RGB or RGBA formats (including RAW and Bayer): full range.
* All Y formats: full range
*
* For all other formats range is undefined, and implementations should use
* an appropriate range for the data represented.
*/
HAL_DATASPACE_RANGE_UNSPECIFIED = 0 << HAL_DATASPACE_RANGE_SHIFT,
/*
* Full range uses all values for Y, Cb and Cr from
* 0 to 2^b-1, where b is the bit depth of the color format.
*/
HAL_DATASPACE_RANGE_FULL = 1 << HAL_DATASPACE_RANGE_SHIFT,
/*
* Limited range uses values 16/256*2^b to 235/256*2^b for Y, and
* 1/16*2^b to 15/16*2^b for Cb, Cr, R, G and B, where b is the bit depth of
* the color format.
*
* E.g. For 8-bit-depth formats:
* Luma (Y) samples should range from 16 to 235, inclusive
* Chroma (Cb, Cr) samples should range from 16 to 240, inclusive
*
* For 10-bit-depth formats:
* Luma (Y) samples should range from 64 to 940, inclusive
* Chroma (Cb, Cr) samples should range from 64 to 960, inclusive
*/
HAL_DATASPACE_RANGE_LIMITED = 2 << HAL_DATASPACE_RANGE_SHIFT,
/*
* Legacy dataspaces
*/
/*
* sRGB linear encoding:
*
* The red, green, and blue components are stored in sRGB space, but
* are linear, not gamma-encoded.
* The RGB primaries and the white point are the same as BT.709.
*
* The values are encoded using the full range ([0,255] for 8-bit) for all
* components.
*/
HAL_DATASPACE_SRGB_LINEAR = 0x200, // deprecated, use HAL_DATASPACE_V0_SRGB_LINEAR
HAL_DATASPACE_V0_SRGB_LINEAR = HAL_DATASPACE_STANDARD_BT709 |
HAL_DATASPACE_TRANSFER_LINEAR | HAL_DATASPACE_RANGE_FULL,
/*
* sRGB gamma encoding:
*
* The red, green and blue components are stored in sRGB space, and
* converted to linear space when read, using the SRGB transfer function
* for each of the R, G and B components. When written, the inverse
* transformation is performed.
*
* The alpha component, if present, is always stored in linear space and
* is left unmodified when read or written.
*
* Use full range and BT.709 standard.
*/
HAL_DATASPACE_SRGB = 0x201, // deprecated, use HAL_DATASPACE_V0_SRGB
HAL_DATASPACE_V0_SRGB = HAL_DATASPACE_STANDARD_BT709 |
HAL_DATASPACE_TRANSFER_SRGB | HAL_DATASPACE_RANGE_FULL,
/*
* YCbCr Colorspaces
* -----------------
*
* Primaries are given using (x,y) coordinates in the CIE 1931 definition
* of x and y specified by ISO 11664-1.
*
* Transfer characteristics are the opto-electronic transfer characteristic
* at the source as a function of linear optical intensity (luminance).
*/
/*
* JPEG File Interchange Format (JFIF)
*
* Same model as BT.601-625, but all values (Y, Cb, Cr) range from 0 to 255
*
* Use full range, BT.601 transfer and BT.601_625 standard.
*/
HAL_DATASPACE_JFIF = 0x101, // deprecated, use HAL_DATASPACE_V0_JFIF
HAL_DATASPACE_V0_JFIF = HAL_DATASPACE_STANDARD_BT601_625 |
HAL_DATASPACE_TRANSFER_SMPTE_170M | HAL_DATASPACE_RANGE_FULL,
/*
* ITU-R Recommendation 601 (BT.601) - 625-line
*
* Standard-definition television, 625 Lines (PAL)
*
* Use limited range, BT.601 transfer and BT.601_625 standard.
*/
HAL_DATASPACE_BT601_625 = 0x102, // deprecated, use HAL_DATASPACE_V0_BT601_625
HAL_DATASPACE_V0_BT601_625 = HAL_DATASPACE_STANDARD_BT601_625 |
HAL_DATASPACE_TRANSFER_SMPTE_170M | HAL_DATASPACE_RANGE_LIMITED,
/*
* ITU-R Recommendation 601 (BT.601) - 525-line
*
* Standard-definition television, 525 Lines (NTSC)
*
* Use limited range, BT.601 transfer and BT.601_525 standard.
*/
HAL_DATASPACE_BT601_525 = 0x103, // deprecated, use HAL_DATASPACE_V0_BT601_525
HAL_DATASPACE_V0_BT601_525 = HAL_DATASPACE_STANDARD_BT601_525 |
HAL_DATASPACE_TRANSFER_SMPTE_170M | HAL_DATASPACE_RANGE_LIMITED,
/*
* ITU-R Recommendation 709 (BT.709)
*
* High-definition television
*
* Use limited range, BT.709 transfer and BT.709 standard.
*/
HAL_DATASPACE_BT709 = 0x104, // deprecated, use HAL_DATASPACE_V0_BT709
HAL_DATASPACE_V0_BT709 = HAL_DATASPACE_STANDARD_BT709 |
HAL_DATASPACE_TRANSFER_SMPTE_170M | HAL_DATASPACE_RANGE_LIMITED,
/*
* Data spaces for non-color formats
*/
/*
* The buffer contains depth ranging measurements from a depth camera.
* This value is valid with formats:
* HAL_PIXEL_FORMAT_Y16: 16-bit samples, consisting of a depth measurement
* and an associated confidence value. The 3 MSBs of the sample make
* up the confidence value, and the low 13 LSBs of the sample make up
* the depth measurement.
* For the confidence section, 0 means 100% confidence, 1 means 0%
* confidence. The mapping to a linear float confidence value between
* 0.f and 1.f can be obtained with
* float confidence = (((depthSample >> 13) - 1) & 0x7) / 7.0f;
* The depth measurement can be extracted simply with
* uint16_t range = (depthSample & 0x1FFF);
* HAL_PIXEL_FORMAT_BLOB: A depth point cloud, as
* a variable-length float (x,y,z, confidence) coordinate point list.
* The point cloud will be represented with the android_depth_points
* structure.
*/
HAL_DATASPACE_DEPTH = 0x1000
} android_dataspace_t;
/*
* Color modes that may be supported by a display.
*
* Definitions:
* Rendering intent generally defines the goal in mapping a source (input)
* color to a destination device color for a given color mode.
*
* It is important to keep in mind three cases where mapping may be applied:
* 1. The source gamut is much smaller than the destination (display) gamut
* 2. The source gamut is much larger than the destination gamut (this will
* ordinarily be handled using colorimetric rendering, below)
* 3. The source and destination gamuts are roughly equal, although not
* completely overlapping
* Also, a common requirement for mappings is that skin tones should be
* preserved, or at least remain natural in appearance.
*
* Colorimetric Rendering Intent (All cases):
* Colorimetric indicates that colors should be preserved. In the case
* that the source gamut lies wholly within the destination gamut or is
* about the same (#1, #3), this will simply mean that no manipulations
* (no saturation boost, for example) are applied. In the case where some
* source colors lie outside the destination gamut (#2, #3), those will
* need to be mapped to colors that are within the destination gamut,
* while the already in-gamut colors remain unchanged.
*
* Non-colorimetric transforms can take many forms. There are no hard
* rules and it's left to the implementation to define.
* Two common intents are described below.
*
* Stretched-Gamut Enhancement Intent (Source < Destination):
* When the destination gamut is much larger than the source gamut (#1), the
* source primaries may be redefined to reflect the full extent of the
* destination space, or to reflect an intermediate gamut.
* Skin-tone preservation would likely be applied. An example might be sRGB
* input displayed on a DCI-P3 capable device, with skin-tone preservation.
*
* Within-Gamut Enhancement Intent (Source >= Destination):
* When the device (destination) gamut is not larger than the source gamut
* (#2 or #3), but the appearance of a larger gamut is desired, techniques
* such as saturation boost may be applied to the source colors. Skin-tone
* preservation may be applied. There is no unique method for within-gamut
* enhancement; it would be defined within a flexible color mode.
*
*/
typedef enum android_color_mode {
/*
* HAL_COLOR_MODE_DEFAULT is the "native" gamut of the display.
* White Point: Vendor/OEM defined
* Panel Gamma: Vendor/OEM defined (typically 2.2)
* Rendering Intent: Vendor/OEM defined (typically 'enhanced')
*/
HAL_COLOR_MODE_NATIVE = 0,
/*
* HAL_COLOR_MODE_STANDARD_BT601_625 corresponds with display
* settings that implement the ITU-R Recommendation BT.601
* or Rec 601. Using 625 line version
* Rendering Intent: Colorimetric
* Primaries:
* x y
* green 0.290 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* KR = 0.299, KB = 0.114. This adjusts the luminance interpretation
* for RGB conversion from the one purely determined by the primaries
* to minimize the color shift into RGB space that uses BT.709
* primaries.
*
* Gamma Correction (GC):
*
* if Vlinear < 0.018
* Vnonlinear = 4.500 * Vlinear
* else
* Vnonlinear = 1.099 * (Vlinear)^(0.45) – 0.099
*/
HAL_COLOR_MODE_STANDARD_BT601_625 = 1,
/*
* Primaries:
* x y
* green 0.290 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* Use the unadjusted KR = 0.222, KB = 0.071 luminance interpretation
* for RGB conversion.
*
* Gamma Correction (GC):
*
* if Vlinear < 0.018
* Vnonlinear = 4.500 * Vlinear
* else
* Vnonlinear = 1.099 * (Vlinear)^(0.45) – 0.099
*/
HAL_COLOR_MODE_STANDARD_BT601_625_UNADJUSTED = 2,
/*
* Primaries:
* x y
* green 0.310 0.595
* blue 0.155 0.070
* red 0.630 0.340
* white (D65) 0.3127 0.3290
*
* KR = 0.299, KB = 0.114. This adjusts the luminance interpretation
* for RGB conversion from the one purely determined by the primaries
* to minimize the color shift into RGB space that uses BT.709
* primaries.
*
* Gamma Correction (GC):
*
* if Vlinear < 0.018
* Vnonlinear = 4.500 * Vlinear
* else
* Vnonlinear = 1.099 * (Vlinear)^(0.45) – 0.099
*/
HAL_COLOR_MODE_STANDARD_BT601_525 = 3,
/*
* Primaries:
* x y
* green 0.310 0.595
* blue 0.155 0.070
* red 0.630 0.340
* white (D65) 0.3127 0.3290
*
* Use the unadjusted KR = 0.212, KB = 0.087 luminance interpretation
* for RGB conversion (as in SMPTE 240M).
*
* Gamma Correction (GC):
*
* if Vlinear < 0.018
* Vnonlinear = 4.500 * Vlinear
* else
* Vnonlinear = 1.099 * (Vlinear)^(0.45) – 0.099
*/
HAL_COLOR_MODE_STANDARD_BT601_525_UNADJUSTED = 4,
/*
* HAL_COLOR_MODE_REC709 corresponds with display settings that implement
* the ITU-R Recommendation BT.709 / Rec. 709 for high-definition television.
* Rendering Intent: Colorimetric
* Primaries:
* x y
* green 0.300 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* HDTV REC709 Inverse Gamma Correction (IGC): V represents normalized
* (with [0 to 1] range) value of R, G, or B.
*
* if Vnonlinear < 0.081
* Vlinear = Vnonlinear / 4.5
* else
* Vlinear = ((Vnonlinear + 0.099) / 1.099) ^ (1/0.45)
*
* HDTV REC709 Gamma Correction (GC):
*
* if Vlinear < 0.018
* Vnonlinear = 4.5 * Vlinear
* else
* Vnonlinear = 1.099 * (Vlinear) ^ 0.45 – 0.099
*/
HAL_COLOR_MODE_STANDARD_BT709 = 5,
/*
* HAL_COLOR_MODE_DCI_P3 corresponds with display settings that implement
* SMPTE EG 432-1 and SMPTE RP 431-2
* Rendering Intent: Colorimetric
* Primaries:
* x y
* green 0.265 0.690
* blue 0.150 0.060
* red 0.680 0.320
* white (D65) 0.3127 0.3290
*
* Gamma: 2.2
*/
HAL_COLOR_MODE_DCI_P3 = 6,
/*
* HAL_COLOR_MODE_SRGB corresponds with display settings that implement
* the sRGB color space. Uses the same primaries as ITU-R Recommendation
* BT.709
* Rendering Intent: Colorimetric
* Primaries:
* x y
* green 0.300 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* PC/Internet (sRGB) Inverse Gamma Correction (IGC):
*
* if Vnonlinear ≤ 0.03928
* Vlinear = Vnonlinear / 12.92
* else
* Vlinear = ((Vnonlinear + 0.055)/1.055) ^ 2.4
*
* PC/Internet (sRGB) Gamma Correction (GC):
*
* if Vlinear ≤ 0.0031308
* Vnonlinear = 12.92 * Vlinear
* else
* Vnonlinear = 1.055 * (Vlinear)^(1/2.4) – 0.055
*/
HAL_COLOR_MODE_SRGB = 7,
/*
* HAL_COLOR_MODE_ADOBE_RGB corresponds with the RGB color space developed
* by Adobe Systems, Inc. in 1998.
* Rendering Intent: Colorimetric
* Primaries:
* x y
* green 0.210 0.710
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* Gamma: 2.2
*/
HAL_COLOR_MODE_ADOBE_RGB = 8
} android_color_mode_t;
/*
* Color transforms that may be applied by hardware composer to the whole
* display.
*/
typedef enum android_color_transform {
/* Applies no transform to the output color */
HAL_COLOR_TRANSFORM_IDENTITY = 0,
/* Applies an arbitrary transform defined by a 4x4 affine matrix */
HAL_COLOR_TRANSFORM_ARBITRARY_MATRIX = 1,
/* Applies a transform that inverts the value or luminance of the color, but
* does not modify hue or saturation */
HAL_COLOR_TRANSFORM_VALUE_INVERSE = 2,
/* Applies a transform that maps all colors to shades of gray */
HAL_COLOR_TRANSFORM_GRAYSCALE = 3,
/* Applies a transform which corrects for protanopic color blindness */
HAL_COLOR_TRANSFORM_CORRECT_PROTANOPIA = 4,
/* Applies a transform which corrects for deuteranopic color blindness */
HAL_COLOR_TRANSFORM_CORRECT_DEUTERANOPIA = 5,
/* Applies a transform which corrects for tritanopic color blindness */
HAL_COLOR_TRANSFORM_CORRECT_TRITANOPIA = 6
} android_color_transform_t;
/*
* Supported HDR formats. Must be kept in sync with equivalents in Display.java.
*/
typedef enum android_hdr {
/* Device supports Dolby Vision HDR */
HAL_HDR_DOLBY_VISION = 1,
/* Device supports HDR10 */
HAL_HDR_HDR10 = 2,
/* Device supports hybrid log-gamma HDR */
HAL_HDR_HLG = 3
} android_hdr_t;
#ifdef __cplusplus
}
#endif
#endif /* SYSTEM_CORE_INCLUDE_ANDROID_GRAPHICS_H */
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